| | Organization Name(s) | Located In |
 | J & T Murphy Limited - Wheelchair Vehicle | Arva |
 | J R Proud Nursing Services - Victoria Place | Port Burwell |
 | Jabez Therapy Ranch | Port Burwell |
 | Jack Miner Migratory Bird Foundation and Sanctuary | Kingsville (Town of) |
 | Jack N'Jill Nursery School, Ridgetown | Ridgetown |
 | Jan McQuiggan Play Therapy | Chatham |
| | Jeffrey G Wyatt Paralegal | Strathroy |
 | Jehovah's Witnesses Kingdom Hall, Wallaceburg | Wallaceburg |
 | Jehovah's Witnesses | Sarnia |
 | Jehovah's Witnesses, Murphy Road | Sarnia |
 | Joanne Morris Art and Play Therapy | Chatham-Kent |
 | Jobmatch, Community Living Wallaceburg | Wallaceburg |
| | John Demars, Director of Administration/Clerk/Deputy C.A.O. , St Clair | Mooretown |
 | John Freeman Walls Historical Site, Underground Railroad Museum | Lakeshore |
 | John Howard Society | Sarnia |
 | John Howard Society, Sarnia Lambton | Sarnia |
 | John Howard Society of London and District | London |
 | John Howard Society of London and District, Bail Verification and Supervision | London |
 | John Howard Society of London and District, Boullee, Huron and Kipps Lane Project | London |
 | John Howard Society of London and District, Children's Groups | London |
 | John Howard Society of London and District, Counselling Services | London |
 | John Howard Society of London and District, Direct Accountability Programming Options | London |
 | John Howard Society of London and District, Institutional Service | London |
 | John Howard Society of London and District, Kingston Trips | London |
 | John Howard Society of London and District, Middlesex County Youth Outreach | London |
 | John Howard Society of London and District, Native Services | London |
 | John Howard Society of London and District, Record Suspension/Pardon Clinics | London |
 | John Howard Society of London and District, Women's Groups | London |
 | John Howard Society of London and District, Youth Community Support | London |
 | John Howard Society of Windsor-Essex County | Windsor Central |
 | John Howard Society of Windsor-Essex County, Anger Management Programs | Windsor Central |
 | John Howard Society of Windsor-Essex County, Bail Verification & Supervision Program | Windsor Central |
 | John Howard Society of Windsor-Essex County, Institutional Services (Men) | Windsor Central |
 | John Howard Society of Windsor-Essex County, Institutional Services (Women) | Windsor Central |
 | John Howard Society of Windsor-Essex County, Juvenile Drug, Alcohol and Self Management Group | Windsor Central |
 | John Howard Society of Windsor-Essex County, Juvenile/Family Counselling | Windsor Central |
 | John Howard Society of Windsor-Essex County, Taking Charge | Windsor Central |
| | John Knox Christian School | Plympton-Wyoming |
 | John Knox Christian School | Woodstock |
 | John McGivney Children's Centre | Windsor West |
 | John McGivney Children's Centre, Assistive Devices Department, Seating and Mobility Clinic, Augmentative Communication Clinic | Windsor West |
 | John McGivney Children's Centre, John McGivney Children's Centre School Authority | Windsor West |
 | John McGivney Children's Centre, Maxillofacial-Speech Clinic | Windsor West |
 | John McGivney Children's Centre, Summer Programs | Windsor West |
| | John McGregor Secondary School | Chatham |
 | John McGregor Secondary School, LAMBTON KENT DISTRICT SCHOOL BOARD, Chatham | Chatham |
 | John N Given Public School, LAMBTON KENT DISTRICT SCHOOL BOARD, Chatham | Chatham |
| | John N. Given | Chatham |
| | John Rodey, C.A.O., St Clair | Mooretown |
| | Jubilee Gardens, County of Lambton, Housing Services Department, Sarnia | Sarnia |
 | Judith & Norman Alix Art Gallery | Sarnia |
| | Junior Achievement, South Western Ontario, Windsor Branch | Windsor |
 | Junior Achievement of London and District | London |
 | Junior Achievement of South Western Ontario | Chatham |
 | Junior Achievement of South Western Ontario, Company Program, Sarnia-Lambton Regional Office | Sarnia |
 | Junior Achievement of South Western Ontario, Sarnia-Lambton Regional Office | Sarnia |
| | Junior Achievement of South Western Ontario, Sarnia-Lambton Regional Office | Sarnia |
 | Juvenile Diabetes Research Foundation Canada - London Chapter | London |